What are merge fields in email templates?

Healthcare organizations are tasked with delivering messages safely while still ensuring patients notice the information. Email remains a natural option as it fits naturally into administrative, clinical, and patient-facing workflows. A recent JMIR Human Factors study of an email-based patient recruitment campaign in primary care found that 96.6% of invitations were successfully delivered and that the initial invitation had a 73.4% open rate, showing that email can still reach patients effectively when it is targeted and relevant.

It can feel impersonal to receive a generic email that starts with “Dear patient,” especially when it is about an appointment, a prescription, a test result, or a billing update. But merge fields can help add in personal touches. They let email templates pull in the right details, like a patient’s name, appointment date, provider or location, at the time the message is sent. Personalizing emails in this way can help patients feel cared for, without staff having to customize each email manually.

What are merge fields in email templates?

A merge field is a placeholder for a specific piece of data in a document or email. Merge fields are placeholders in email templates that, when the message is generated, will automatically be filled with real data from a data source. A study on appointment reminders published in the Journal of General Internal Medicine found that one way to improve healthcare reminders is to “add a personal touch,” exactly what merge fields help email templates do at scale.

A sender can add a merge field instead of typing the same greeting thousands of times. When the email is sent, the system then replaces that placeholder with the recipient’s first name.

Where does the information used in merge fields come from?

Merge fields are pointers to data sources. Each field in a template must map to a field in your database, electronic health record (EHR), customer relationship management (CRM), or other integrated record system.

A JMIR Human Factors study on the organization of EHR data explains, “Typically, these solutions categorize the electronic health record (EHR) data by type, time stamp, or provider.” When the message is sent, the template engine retrieves the correct value from that structured data and inserts it into the message. For example, a merge field can pull a patient’s name, appointment date, provider, location, or prescription status from the record associated with the email before the email is sent.

Are merge fields safe for HIPAA compliant email use?

A placeholder in a merge field does not contain PHI until the merge populates it. But once the values are substituted, the email that results contains PHI and must be securely transmitted and stored. Paubox’s dynamic email template feature, powered by Handlebars syntax and a secure, HITRUST CSF certified infrastructure, addresses this challenge. Paubox Email API allows developers to send PHI in transactional emails and remain compliant. The API is HIPAA compliant and HITRUST certified, so “you can safely include protected health information (PHI) in your messages to patients, such as test results, appointment reminders, etc.” The platform secures messages in transit and supports direct inbox delivery without requiring patients to log in to a portal.

With the right safeguards, merge fields do not have to increase risk, but they must be mapped, tested, transmitted, and stored securely. Data is pulled from your system and inserted into the template on a backend server, then encrypted before delivery. Patients receive an email in their regular inbox, but the content is seamlessly decrypted without requiring them to log in to a portal. For organizations sending appointment reminders, lab results or follow‑up instructions, this means they can meet privacy obligations while delivering timely, personalized messages.

Risks of choosing poor solutions

If you have an insecure or inefficient email system, the benefits of merge fields are non-existent. Personalized messages without proper encryption can expose PHI to unauthorized parties. Mis-typed merge fields can add wrong data to a message and can expose one patient’s information to another. And if your email platform isn’t secure, attackers can spoof your organization or attack your staff with malicious messages using normal workflows.

In a Paubox 2025 IT survey, it was found that 60% of healthcare organizations experienced email-related security incidents in 2024, and 95% of phishing attacks were not reported to security teams. The same report found that 83% of healthcare organizations said legacy systems disrupt everyday operations.

How do merge fields connect to Paubox dynamic templates?

Personalization can improve healthcare outcomes. A study published in the JSES Open Access examined the impact of email reminders on patient‑reported outcome measure (PROM) completion. Researchers found that adding email reminders to follow‑up protocols increased the overall collection of complete PROM data sets by 25.8% compared with relying on in‑office tablet surveys alone. By allowing patients to complete surveys at home and at their own pace, the reminders captured data that would otherwise have been lost. The study concluded that email reminders should be included in outcome database platforms.

Messages that mention the patient’s name, reference their specific procedure, and offer a direct link to the survey sound more legitimate and urgent. Merge fields allow that level of personalization to occur without staff having to customize each message. Combined with a HIPAA compliant platform such as Paubox, they allow healthcare providers to deliver timely, relevant communications that support clinical care, research, and patient satisfaction.

FAQs

What are merge fields in Paubox dynamic templates?

Merge fields are placeholders inside a dynamic email template that are replaced with real information when the email is sent.

Do Paubox dynamic templates require coding?

Paubox dynamic templates can be managed in the Paubox Email API dashboard.

How does the Paubox dashboard help with merge fields?

The Paubox dashboard detects variables in a dynamic template, helping teams confirm which merge fields they are using before saving.